A new development of Al-Ti-C grain refining master alloys①
(Department of Materials Science and Engineering, Tsinghua University, Beijing100084, P.R.China)
Abstract: Al-Ti-C master alloys have been prepared with a novel production method. A combination of X-ray phase analysis, SEM and EDS was used to examine the phases and microstructures of the master alloys. The master alloys have block-like Al3Ti particles and submicron size TiCXwithXranging from 0.49 to 0.78 and show excellent grain refining performance for commercially pure aluminum. Titanium carbides were observed at the crystallization centers in refined castings.
Key words: Al-Ti-C; master alloy; microstructure; grain refinement